The heroes do not discover the center of the Earth. They re-discover Saknussemm’s path. Every landmark — the crater of Snæfellsjökull, the central shaft, the underground sea, the mushroom forest, the graveyard of prehistoric bones — has already been seen by Saknussemm. The travelers are merely retracing his steps, three centuries later.
The entire plot of Journey is triggered by a single piece of parchment: a runic manuscript containing Saknussemm’s confession of his descent to the center of the Earth. But the text is scrambled — a cipher within a cipher. Professor Lidenbrock’s obsession is not just with geology, but with decoding . Saknussemm, long dead, still controls the living through a puzzle.